"Já ho za dobrého otce nepovažuju."

Translation: I do not consider him a good father.

[btopps]

How exactly is "za" translated here?

[VladaFu]

You cannot translate every word. Different verbs have different kind of valences in different languages. "to consider somebody something" is "považovat někoho za něco". It is just a preposition used with the verb.

[ken55414]

In this case, does "za" require accusative or genitive?

[VladaFu]

accusative, genitive would be něčeho, not něco

[Juggler69]

Does 'za' always accompany 'považovat'?

[VladaFu]

Yes, but there is also "považovat si" which means something else and is used differently.

[Juggler69]

Děkuju.

[ndrzxc]

I just got a typo when I wrote "považuji" instead of "považuje". But as far as I know both answers are correct and are just equivalent forms

[VladaFu]

považuje is wrong. You need považuju or považuji, both are correct. Not equivalent though, považuji is formal.